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Micromac IIsi Cache adapter schematics?

Posted by: Jockelill on 2024-02-05 07:10:45 Does anyone have schematics for the Micromac IIsi -> IIci Cache/PDS adapter? I'm trying to build one (for my IIsi), and while both the PDS and Cache is documented in the developer notes, I can see that several of the pins on the cache slot which are marked at N/C in the documentation are actually connected 🙁. I've worked of the two pictures below but realizd that the original board also has inner signal layers making it a bit harder to retrace. I also needed to move the cache slot since otherwise @Melkhior 's nice graphics card won't fit (there is space below). I'm guessing the original board is actually 6 layers (4 signal, ground and 5V plane) since it does not have any visible vias at all.

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